Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Reexamination Certificate
2008-04-01
2008-04-01
Bovernick, Rodney (Department: 2874)
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
C385S123000, C359S341100, C359S341300
Reexamination Certificate
active
07352949
ABSTRACT:
The present invention relates to a fiber having a core of crystal fiber doped with chromium and a glass cladding. The fiber has a gain bandwidth of more than 300 nm including 1.3 mm to 1.6 mm in optical communication, and can be used as light source, optical amplifier and tunable laser when being applied for optical fiber communication. The present invention also relates to a method of making the fiber. First, a chromium doped crystal fiber is grown by laser-heated pedestal growth (LHPG). Then, the crystal fiber is cladded with a glass cladding by codrawing laser-heated pedestal growth (CDLHPG). Because it is a high temperature manufacture process, the cladding manufactured by this method is denser than that by evaporation technique, and can endure relative high damage threshold power for the pumping light.
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Chia-Yao Lo, et al.; Glass-CLAD CR4+:YAG Crystal Fiber for the . . . Emission; Mar. 1, 2004; vol. 29; No. 5; Optics Letters; pp. 439-441.
Lin, Y-S, et al., “Nanostructure formation of double-clad Cr4+:YAG crystal fiber grown by co-drawing laser-heated pedestal,”Journal of Crystal Growth289, 2006, pp. 515-519.
Huang Kwang-Yao
Huang Sheng-Lung
Huang Sheng-Pan
Lee Hsiao-Wen
Lo Chia-Yao
Bovernick Rodney
Ladas and Parry LLP
National Sun Yat-Sen University
Rojas Omar
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